EP 0555710 B1 20000531 - Liquid transfer device for a clinical analyser
Title (en)
Liquid transfer device for a clinical analyser
Title (de)
Flüssigkeitstransfereinrichtung für ein Analysegerät
Title (fr)
Dispositif de transfert de liquide pour appareil d'analyse
Publication
Application
Priority
DE 4203638 A 19920208
Abstract (en)
[origin: EP0555710A2] Liquids transfer device for an analyser, having a capacitive liquid-level detector (10) for detecting the immersion of a liquid-transfer needle (5) into an analysis liquid (4). A more reliable function, especially an improved ratio between the useful signal and noise signals, is achieved by the liquid transfer needle (5) forming part of a coaxial electrode arrangement (11) which, in addition to the liquid transfer needle (5) includes at least one coaxial electrode (12,13), which surrounds the needle and is insulated therefrom, and by the detection circuit (17), which serves to detect a change of the capacity between the electrodes (5,13) of the liquid level detector (10), having a voltage follower circuit (23), connected to whose input (23a) and output (23b) there are two adjacent electrodes (5,12) of the coaxial electrode arrangement (11) as a signal electrode and a compensation electrode, so that no voltage differential arises between the signal electrode and the compensation electrode. <IMAGE>
IPC 1-7
IPC 8 full level
G01F 23/26 (2006.01); G01N 35/10 (2006.01)
CPC (source: EP US)
G01F 23/263 (2013.01 - EP US); G01F 23/266 (2013.01 - EP US); G01F 23/268 (2013.01 - EP US); G01N 35/1009 (2013.01 - EP US); G01N 2035/1025 (2013.01 - EP US)
Citation (examination)
- US 3754444 A 19730828 - URE S, et al
- GB 2245707 A 19920108 - SYCOPEL SCIENT LTD [GB]
- RESEARCH DISCLOSURE, NO. 254, June 1985, pages 296-299, disclosure no. 25430, Emsworth, Hampshire, GB 'Niveau-Fühlanordnung für Pipettiervorrichtung'
Designated contracting state (EPC)
BE CH DE ES FR GB IE IT LI LU NL PT SE
DOCDB simple family (publication)
EP 0555710 A2 19930818; EP 0555710 A3 19950208; EP 0555710 B1 20000531; DE 4203638 A1 19930812; DE 59310050 D1 20000706; ES 2147734 T3 20001001; JP H05340789 A 19931221; JP H07119642 B2 19951220; US 5304347 A 19940419
DOCDB simple family (application)
EP 93101471 A 19930130; DE 4203638 A 19920208; DE 59310050 T 19930130; ES 93101471 T 19930130; JP 1885393 A 19930205; US 1427193 A 19930205